Hydrazine and process of preparing the same



Patented Apr. 2, 1940 UNITED STATES rare OFFICE HYDRAZINE AND PROCESS OF PREPARING THE SAME Max Schmid, Riehen, Switzerland, assignor to the firm Society of Chemical Industry in Basic,

Basel, Switzerland No Drawing. Application April 26, 1939, Serial No. 270,248. In Switzerland April 9, 1936 2 Claims. (01. 2s0 51o The present application is a continuation-inpart of my copending application Serial No. 134,452, filed April 1, 1937.

It has been found that a new hydrazine can be obtained .by treating with a saponifying agent such as a strong acid, for example sulfuric acid, hydrochloric acid, phosphoric acid or benzenedisulfonic acid, the N-sulfo-derivative of the formulaobtainable by careful reduction of the compound of the formula S0311 SO3H H H I The new hydrazine of the formula soan s oan CH=CH 3NH2 is a light powder which is soluble in alkalies and on the one hand combines the reaction of an aromatic amine and on the other hand the reaction of an aromatic hydrazine.

The following example illustrates the invention:

which dissolves in dilute sodium carbonate solution to a yellowish solution.

What I claim is: I I 1. Process for the manufacture of a hydrazine, comprising treating the product of the formula SOaH SOSH with a sapcnifying agent. 7 2. The aminohydrazine-disulfonic acid corresponding in the free state to the formula MAX SCHIVHJI 

